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Q.
The number and type of bonds between two carbon
atoms in $CaC_2$ are
Chemical Bonding and Molecular Structure
Solution:
In $\mathrm{CaC}_{2}$ we have $\mathrm{Ca}^{2+}$ and $\mathrm{C}_{2}^{2-}$ which are held together by ionic bonds. The structure of $\mathrm{C}_{2}^{2-}$ is $[\mathrm{C} \equiv \mathrm{C}]^{2-}$, thus it contains one $\sigma$ - and two $\pi$ -bonds between two carbon atoms.